Returns the hash code of this annotation. The hash code is determined according to the following rules:

• The hash code of an annotation is the sum of the hash codes of its annotation members.
• The hash code of an annotation member is calculated as (0x7f * n.hashCode()) ^ v.hashCode()), where n is the name of the member (as a String) and v its value.
• The hash code for a primitive member value is determined using the corresponding wrapper type. For example, Integer.valueOf(v).hashCode() is used for an int value v.
• The hash code for an array member value v is determined using the corresponding hashCode(v) helper function in Java.Util.Arrays.
• The hash code for all other member values is determined by simply calling their hashCode method.

[Android Documentation]